High Pressure High Temperature V Sealing Stacks



V-Packing is an assembly made up of a nest of Chevron rings comprising a top adapter or anti-extrusion ring, Inner V-Rings and a bottom adapter. In the assembly, the energizing axial force is transferred between the individual packing rings so that each ring is pressed into positive contact with the mating hardware surface. Special material grades are available for a large variety of working conditions.

The top adapter or anti-extrusion ring is manufactured from a high modulus plastic, typically PEEK™, to resist extrusion. This component supports the Vee Rings, providing stability and extrusion resistance.

Inner V-Rings are typically made from filled PTFE materials; although, depending on the application, elastomers can be used as well to offer better sealing efficiency.

The bottom adapter ring is manufactured from PEEK™ or glass-filled PTFE. The function of this component is to ensure a uniform pressure distribution.



Operating Pressure

Up to 20,000 psi


Up to 3.3 ft/s depending on the material

Temperature Range

-45 °C to +260 °C /
-49 °F to +500 °F
Dependent on material

Design Considerations

Mid Piece NumberPacking Cross Section


Recommended Number of V-ring Per Set (Solid Uncut Rings)

Rubber Application Pressure(PSI)Fabric Reinforced Application Pressure(PSI)Number Required
500 to 1,000500 to 15003
1000 to 12001,500 to 3,0004
2000 to 30003,000 to 5,0005
3000 to 50005,000 to 10,0006
5000 over10,000 and over7


Typical oil and gas applications

  • Electrical logging: Logging While Drilling (LWD) / Measurement While Drilling (MWD) Tools
  • Drilling and steerable tools
  • Reservoir sampling tools
  • Wellheads: tubing hanger seals & flow control tools
  • Risers and Compensators
  • Gas lifts
  • Sub surface safety valves and valve stem seals
  • Polished bore receptacles
  • Sliding sleeves

Quality You Can Rely On


All parts are measured on our Zeiss O-Machine and or Keyence CMM, which utilize optical and contact measurement technology in a comprehensive analysis. The O-Machine includes multi-sensor coordinate measuring, white light sensors for non-contact assessments and extremely accurate 3D scanners.

We follow AQL 2.5 levels 1 and 2 sample size quantities, and all molded parts are manufactured to RMA A2 tolerances. 

What comes with your orders:

  • Every order is sent with either a paper or digital QC document that includes ID, OD, C/S, Height, angles, and any other dimensions your organization feels critical. 


Our rubber and plastic materials supply is diversified amongst the top compounders in North America. Each polymer has been qualified to meet typical exploration and production well conditions, including mechanical, tribological, thermal, and specific immersive properties.

What comes with your orders:

  • Every order comes with an MTR that includes a batch number, cure dates, and a set of mechanical properties.

Available Compounds

Let’s Talk

You’ve made it this far, but we know there is still more to discuss. Click on the book a meeting button below to easily setup up a date and time to talk more about your project. You can also email us at info@kcseals.ca

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